视屏有问题啊？

求这一期的R代码

这一期有R script吗？

载入程辑包：‘gdata’ The following object is masked from ‘package:stats’: nobs The following object is masked from ‘package:utils’: object.size The following object is masked from ‘package:base’: startsWith > read.xlsx(YKH.example1.xlsx) Error in read.xlsx(YKH.example1.xlsx) : could not find function "read.xlsx" 请问这是什么意思

> class(matchdata) [1] "tbl_df" "tbl" "data.frame" 老师好~第三个是“数据集”的意思，那前两个是什么意思啊？

好像画音不一致啊,是我网速的原因吗?